The process opposite to 'dispersion' is termed as the(A) Flocculation(B) Sedimentation(C) Filtration(D) None of these

The process opposite to 'dispersion' is termed as the
(A) Flocculation
(B) Sedimentation
(C) Filtration
(D) None of these
by

1 Answer

Answer :

(A) Flocculation
by

Related questions

If a force greater than that of gravity is used to separate solids & fluidsof different densities, the process is termed as the(A) Sedimentation(B) Flocculation(C) Dispersion(D) Centrifugation

Description : If a force greater than that of gravity is used to separate solids & fluidsof different densities, the process is termed as the (A) Sedimentation (B) Flocculation (C) Dispersion (D) Centrifugation

Last Answer : (D) Centrifugation

The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Description : The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Last Answer : (4) Water softening Explanation: Water softening is the reduction of the concentration of calcium, magnesium, and certain other metal cations in hard water. Hardness ions dissolved in water can cause a ... use depend on an ion-exchange resin in which hardness ions are exchanged for sodium ions.

The main process to purify water by filtration, is (A) Mechanical straining (B) Flocculation and sedimentation (C) Biological metabolism (D) All the above

Description : The main process to purify water by filtration, is (A) Mechanical straining (B) Flocculation and sedimentation (C) Biological metabolism (D) All the above

Last Answer : (D) All the above

The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Description : The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Last Answer :  Water softening

The process by which fine solids is removed from liquids is termed as (A) Decantation (B) Flocculation (C) Sedimentation (D) Classification

Description : The process by which fine solids is removed from liquids is termed as (A) Decantation (B) Flocculation (C) Sedimentation (D) Classification

Last Answer : (C) Sedimentation

Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the (A) Coagulation (B) Flocculation (C) Sedimentation (D) Clarification

Description : Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the (A) Coagulation (B) Flocculation (C) Sedimentation (D) Clarification

Last Answer : (C) Sedimentation

If Organic sources of carcinogenic compounds in water persist even after chlorination, then what is the correct sequence among treatment processes listed below if all these are considered compulsory ? 1. Coagulation 2. Sedimentation 3. Filtration in general 4. Activated carbon bed filtration 5. Flocculation 6. Chlorination a) 4-5-3-2-6 and 1 b) 1-2-3-4-5 and 6 c) 4- 2- 3- 1- 5 and 6 d) 1-5-2-3-4 and 6

Description : If Organic sources of carcinogenic compounds in water persist even after chlorination, then what is the correct sequence among treatment processes listed below if all these are considered compulsory ? 1. Coagulation 2. Sedimentation 3. Filtration in ... c) 4- 2- 3- 1- 5 and 6 d) 1-5-2-3-4 and 6

Last Answer : d) 1-5-2-3-4 and 6

Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation. (A) Clarification(B) Sedimentation(C) Flocculation(D) Classification

Description : Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation. (A) Clarification (B) Sedimentation (C) Flocculation (D) Classification

Last Answer : (D) Classification

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted waterstream?(A) Sedimentation tank(B) Circular clarifier(C) Mechanical flocculation(D) Chemical coagulation

Description : Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted waterstream? (A) Sedimentation tank (B) Circular clarifier (C) Mechanical flocculation (D) Chemical coagulation

Last Answer : (D) Chemical coagulation

In water treatment, alum [Al2 (SO4 )3 ] is used for the process of (A) Filtration (B) Coagulation (C) Sedimentation (D) Disinfection

Description : In water treatment, alum [Al2 (SO4 )3 ] is used for the process of (A) Filtration (B) Coagulation (C) Sedimentation (D) Disinfection

Last Answer : (B) Coagulation

An emulsifier is an agent which – (1) stabilises an emulsion (2) aids the flocculation of an emulsion (3) accelerates the dispersion (4) homogenises an emulsion

Description : An emulsifier is an agent which – (1) stabilises an emulsion (2) aids the flocculation of an emulsion (3) accelerates the dispersion (4) homogenises an emulsion

Last Answer : (1) stabilises an emulsion

An emulsifier is an agent which (1) stabilises an emulsion (2) aids the flocculation of an emulsion (3) accelerates the dispersion (4) homogenises an emulsion

Description : An emulsifier is an agent which (1) stabilises an emulsion (2) aids the flocculation of an emulsion (3) accelerates the dispersion (4) homogenises an emulsion

Last Answer :  stabilises an emulsion

The process of passing water through beds of granular materials, is called (A) Screening (B) Sedimentation (C) Filtration (D) None of these

Description : The process of passing water through beds of granular materials, is called  (A) Screening  (B) Sedimentation  (C) Filtration  (D) None of these 

Last Answer : (C) Filtration 

During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank. (A) Filtration (B) Digestion (C) Sedimentation (D) Both (B) and (C)

Description : During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank. (A) Filtration (B) Digestion (C) Sedimentation (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Pick out the true statement pertaining to water treatment. (A) Slow sand filters can remove colour completely (B) Activated carbon can be used for taste & odour control without subsequent filtration (C) Application of activated carbon reduces the temporary hardness of water (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Description : Pick out the true statement pertaining to water treatment. (A) Slow sand filters can remove colour completely (B) Activated carbon can be used for taste & odour control without subsequent filtration ... of water (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Last Answer : (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Why Filtration is a better method than simple sedimentation and decantation?

Description : Why Filtration is a better method than simple sedimentation and decantation?

Last Answer : Filtration can remove solid particles as small as 1 micron.Simply decanting, or allowing solids to settle - will not removethe smallest particles.

Iodine can be separated from a mixture of Iodine and Potassium Chloride by - (1) Filtration (2) Sublimation (3) Distillation (4) Sedimentation

Description : Iodine can be separated from a mixture of Iodine and Potassium Chloride by - (1) Filtration (2) Sublimation (3) Distillation (4) Sedimentation

Last Answer : (2) Sublimation Explanation: Iodine can be separated from a mixture of Iodine and Potassium Chloride by Sublimation. Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

Iodine can be separated from a mixture of Iodine and Potassium Chloride by – (1) sedimentation (2) filtration (3) sublimation (4) distillation

Description : Iodine can be separated from a mixture of Iodine and Potassium Chloride by – (1) sedimentation (2) filtration (3) sublimation (4) distillation

Last Answer : (3) sublimation Explanation: Iodine is well known to sublime (change from solid to gas without becoming liquid in between) when heated. However sodium chloride has a melting point much higher ... by using a sublimation apparatus, with solid iodine collected by condensation on a cold surface.

During treatment of water, sedimentation is done (A) Before filtration (B) After filtration (C) Simultaneously with filtration (D) Along with chlorination

Description : During treatment of water, sedimentation is done  (A) Before filtration  (B) After filtration  (C) Simultaneously with filtration  (D) Along with chlorination 

Last Answer : (A) Before filtration 

To remove very fine suspended particles from water, the method adopted is (A) Screening (B) Sedimentation (C) Boiling (D) Filtration

Description : To remove very fine suspended particles from water, the method adopted is  (A) Screening  (B) Sedimentation  (C) Boiling  (D) Filtration

Last Answer : To remove very fine suspended particles from water, the method adopted is  (A) Screening  (B) Sedimentation  (C) Boiling  (D) Filtration

Iodine can be separated from a mixture of Iodine and Potassium Chloride by (1) sedimentation (2) filtration (3) sublimation (4) distillation

Description : Iodine can be separated from a mixture of Iodine and Potassium Chloride by (1) sedimentation (2) filtration (3) sublimation (4) distillation

Last Answer : sublimation

Solid particles separation based on the difference in their flow velocities through fluids is termed as the (A) Clarification (B) Classification (C) Elutriation (D) Sedimentation

Description : Solid particles separation based on the difference in their flow velocities through fluids is termed as the (A) Clarification (B) Classification (C) Elutriation (D) Sedimentation

Last Answer : (B) Classification

The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as :

Description : The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as :

Last Answer : The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as : A. aerosol B. foam C. emulsion D. gel

Separation of materials into products based on the difference of theirsizes is called(A) Sizing(B) Sorting(C) Classification(D) Flocculation

Description : Separation of materials into products based on the difference of theirsizes is called (A) Sizing (B) Sorting (C) Classification (D) Flocculation

Last Answer : (A) Sizing

Additives used for promoting the flocculation of particles is a/an (A) Electrolyte (B) Surface active agent (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Additives used for promoting the flocculation of particles is a/an (A) Electrolyte (B) Surface active agent (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

For benefication of iron ore, the most commonly used method is (A) Flocculation (B) Froth floatation (C) Jigging & tabling (D) None of these

Description : For benefication of iron ore, the most commonly used method is (A) Flocculation (B) Froth floatation (C) Jigging & tabling (D) None of these

Last Answer : (C) Jigging & tabling

Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are (A) Carbonates (B) Sulphates (C) Silicates & phosphates (D) Bi-carbonates

Description : Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are (A) Carbonates (B) Sulphates (C) Silicates & phosphates (D) Bi-carbonates

Last Answer : (C) Silicates & phosphates

Which of the following is not used as a surface active agent in a flocculation operation? (A) Sodium silicate (B) Quartz (C) Lime (D) Alumina

Description : Which of the following is not used as a surface active agent in a flocculation operation? (A) Sodium silicate (B) Quartz (C) Lime (D) Alumina

Last Answer : (B) Quartz

Separation of materials of the same density based on their sizes by using then-different rates of flow is called (A) Sorting (B) Sizing (C) Flocculation (D) Elutriation

Description : Separation of materials of the same density based on their sizes by using then-different rates of flow is called (A) Sorting (B) Sizing (C) Flocculation (D) Elutriation

Last Answer : (B) Sizing

Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in (A) Coagulation and flocculation of colloids (B) Oxidation of carbonaceous matter to CO2 (C) Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate (D) All (A), (B) and (C)

Description : Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in (A) Coagulation and flocculation of colloids (B) Oxidation of carbonaceous matter to CO2 (C) ... to the nitrite and eventually to the nitrate (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Use of chlorine in the treatment of sewage (A) Helps in grease separation (B) Increases the biological oxygen demand (BOD) (C) Causes bulking of activated sludge (D) Aids in flocculation

Description : Use of chlorine in the treatment of sewage (A) Helps in grease separation (B) Increases the biological oxygen demand (BOD) (C) Causes bulking of activated sludge (D) Aids in flocculation

Last Answer : (A) Helps in grease separation

Gravity settling process is not involved in the working of a (A) Hydrocyclone (B) Classifier (C) Dorr-thickener (D) Sedimentation tank

Description : Gravity settling process is not involved in the working of a (A) Hydrocyclone (B) Classifier (C) Dorr-thickener (D) Sedimentation tank

Last Answer : (A) Hydrocyclone

__________ is the process of killing organism in water. (A) Coagulation (B) Sterilisation (C) Disinfection (D) Sedimentation

Description : __________ is the process of killing organism in water. (A) Coagulation (B) Sterilisation (C) Disinfection (D) Sedimentation

Last Answer : (C) Disinfection

Very fine suspended and colloidal impurities are removed from water by a process called (A) Sedimentation (B) Coagulation (C) Disinfection (D) Softening

Description : Very fine suspended and colloidal impurities are removed from water by a process called (A) Sedimentation (B) Coagulation (C) Disinfection (D) Softening

Last Answer : (B) Coagulation

If an electric field is applied to a colloidal sol, the dispersed phase particles are found to move towards the electrode of opposite charge. If however, the dispersed phase is made stationary, the dispersion medium is found to move in the opposite direction. What is the term used for such movement of dispersion medium ?

Description : If an electric field is applied to a colloidal sol, the dispersed phase particles are found to move towards the electrode of opposite charge. If however, the dispersed phase is made stationary, the ... move in the opposite direction. What is the term used for such movement of dispersion medium ?

Last Answer : Ans. Electro osmosis. 

Effective electrolyte to cause the flocculation of a negatively charged arsenium sulphide colloid is :

Description : Effective electrolyte to cause the flocculation of a negatively charged arsenium sulphide colloid is :

Last Answer : Effective electrolyte to cause the flocculation of a negatively charged arsenium sulphide colloid is : A. `NaCl` B. ` ... 3)Fe(CN)_(6)` D. `AlCl_(3)`

The minimum concentration of an electrolyte required to cause coagulation of a sol is called its flocculation value. It is expressed in millimoles per

Description : The minimum concentration of an electrolyte required to cause coagulation of a sol is called its flocculation value. It is expressed in millimoles per

Last Answer : The minimum concentration of an electrolyte required to cause coagulation of a sol is called its ... )` sol so that flocculation just starts ?

Which of the following anions will have minimum flocculation value for the ferric oxide solution?

Description : Which of the following anions will have minimum flocculation value for the ferric oxide solution?

Last Answer : Which of the following anions will have minimum flocculation value for the ferric oxide solution? A. `Cl^(-)` B. `Br^( ... 2-)` D. `[Fe(CN)_(6)]^(3-)`

In prehepatic jaundice, protein flocculation test is (A) Normal/weekly positive (B) Usually positive (C) Negative (D) None of these

Description : In prehepatic jaundice, protein flocculation test is (A) Normal/weekly positive (B) Usually positive (C) Negative (D) None of these

Last Answer : Answer : A

What is the unit for expressing flocculation value ?

Description : What is the unit for expressing flocculation value ?

Last Answer : Ans. millimole per litre. 

Reaction of soluble antigen with antibody is ____A. Agglutination B. Precipitation C. Flocculation D. CFT

Description : Reaction of soluble antigen with antibody is ____A. Agglutination B. Precipitation C. Flocculation D. CFT

Last Answer : Precipitation

Peel of rock due to temperature variation is called as — a. Flocculation b. Exfoliation c. Foliation d. Decomposition

Description : Peel of rock due to temperature variation is called as — a. Flocculation b. Exfoliation c. Foliation d. Decomposition

Last Answer : b. Exfoliation

Pick out the wrong statement. (A) Recycled coarse material to the grinder by a classifier is termed as circulating load (B) Wear and tear in wet crushing is more than that in dry crushing of materials (C) Size enlargement (opposite of size reduction) is not a mechanical operation (D) A 'dust catcher' is simply an enlargement in a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas

Description : Pick out the wrong statement. (A) Recycled coarse material to the grinder by a classifier is termed as circulating load (B) Wear and tear in wet crushing is more than that in dry crushing of ... a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas

Last Answer : (C) Size enlargement (opposite of size reduction) is not a mechanical operation

Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation

Description : Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation

Last Answer : Ans:(a)

A process of very slow regulated cooling is known as (a) Quenching (b) Sedimentation (c) Annealing (d) Diffusion

Description : A process of very slow regulated cooling is known as (a) Quenching (b) Sedimentation (c) Annealing (d) Diffusion

Last Answer : Ans:(c)

The process of judicious removal of parts like leaf, flower, fruits etc. to obtain good and qualitative yield is called? a. Training b. Pruning c. Fustigation d. Sedimentation e. None of these

Description : The process of judicious removal of parts like leaf, flower, fruits etc. to obtain good and qualitative yield is called? a. Training b. Pruning c. Fustigation d. Sedimentation e. None of these

Last Answer : b. Pruning

During sewage treatment, effluent from which one of the following treatment units has minimum wt/vol amount of suspended solids? (a) Detritus channel (b) Primary sedimentation tank (c) Secondary sedimentation tank (d) Activated sludge process aeration tank

Description : During sewage treatment, effluent from which one of the following treatment units has minimum wt/vol amount of suspended solids? (a) Detritus channel (b) Primary sedimentation tank (c) Secondary sedimentation tank (d) Activated sludge process aeration tank

Last Answer : (d) Activated sludge process aeration tank

Filter medium resistance is important during the __________ of filtration. (A) Early stages (B) Final stages (C) Entire process (D) None of these

Description : Filter medium resistance is important during the __________ of filtration. (A) Early stages (B) Final stages (C) Entire process (D) None of these

Last Answer : (A) Early stages

Iron & manganese present as pollutant in water cannot be removed by (A) Ion exchange process (B) Oxidation followed by settling & filtration (C) Lime soda process or manganese zeolite process(D) Chlorination

Description : Iron & manganese present as pollutant in water cannot be removed by (A) Ion exchange process (B) Oxidation followed by settling & filtration (C) Lime soda process or manganese zeolite process (D) Chlorination

Last Answer : (D) Chlorination

Sedimentation on commercial scale occurs in (A) Classifiers (B) Thickeners (C) Rotary drum filters (D) Cyclones

Description : Sedimentation on commercial scale occurs in (A) Classifiers (B) Thickeners (C) Rotary drum filters (D) Cyclones

Last Answer : (C) Rotary drum filters